The result is something like $VAR1->{'1'}{'test2'}.

##</code><code>##

$VAR2 = {
          '2' => {
                   'test1' => {
                                '1' => $VAR1->{'1'}{'test1'},
                                ...

##</code><code>##

$VAR1 = {
          '2' => {
                   'test1' => {
                                '1' => {
                                         'key2' => '2',
                                         'key1' => '1',
                                         'key3' => '3'
                                       },
                                ...